SHARP-SHINNED HAWK. 529 
white. The female has the markings on the lower parts much nar- 
rower at this age. 
A male bird preserved in spirits pre- a 
sents the following characters :—The roof 
of the mouth is flat, with two longitudi- 
nal ridges ; the posterior aperture of the 
nares oblong, with a linear anterior slit, Hi/ 
papillate on the edges. The tongue is 5 
twelfths long, narrow, concave above, 
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slightly emarginate. The cesophagus, 
abcde, is 3 inches 8 twelfths long; its 
diameter at the upper part 5 twelfths ; it 
enlarges on the neck to a capacious crop, 
ed, 1 inch in diameter. ‘he proventri- 
culus, ¢, has a complete belt of small ob- 
long glandules. ‘The stomach, / g, is 
large, roundish, membranous, without dis- 
tinct muscles, 1 inch 3 twelfths long, and 
1 inch broad. The intestine, g 471, is 
143 inches long, its greatest diameter 2 
twelfths. ‘The rectum, 7 /, is 1 inch 9 
twelfths long; its diameter at the ante- 
rior part 3 twelfths; the cceca, 7, are 
exceedingly small, forming two scarcely 
| observable sacs, about half a twelfth in 
depth. The trachea is 2,5 inches long, its 
rings unossified, 78 in number ; the bron- 
chi long and slender, of about 18 half 
rings. The contents of the crop and sto- 
mach were portions of two small birds. 
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On comparing several specimens, 
male and female, of this Sharp-shinned 
Hawk, with others of the European Spar- 
row Hawk, the proportions are found to 
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be similar, as are the colours of the upper parts; but the American 
birds, especially the males, are much smaller; and the transverse bands 
on the lower parts of the Sharp-shinned Hawk are redder and broader 
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